United Parcel Service Inc. posted mixed second-quarter results, with revenue rising 1.9% from a year earlier to $21.2 billion and topping analysts’ expectations of about $20.9 billion. Operating profit came in at $1.8 billion, while GAAP diluted earnings were $1.51 a share. Excluding one-time items, adjusted earnings were $1.55, narrowly missing the $1.56 consensus and sliding from $1.79 a year ago, as higher costs and weaker parcel volumes weighed on margins. UPS said the quarter was pressured by continuing macroeconomic uncertainty and recently imposed tariffs on low-value Chinese shipments, factors that made demand and pricing harder to predict. GAAP operating margin was 8.6%, or 8.8% on an adjusted basis, compared with double-digit levels a year earlier. Citing the volatile backdrop, the Atlanta-based company withdrew revenue and operating-profit guidance for 2025. Management reaffirmed plans for roughly $3.5 billion in capital spending and said it still expects to return about $5.5 billion to shareholders through dividends, pending board approval. The effective tax rate is projected to average about 23.5% for the year. Investors reacted negatively to the slimmer profits and lack of outlook. UPS shares fell as much as 4% in early New York trading before the market open on Tuesday.